<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>拖拽</title>
  <link rel="stylesheet" href="../base.css">
  <link rel="stylesheet" href="./21.css">
</head>
<body>
  <div id="app">
    
    <div class="list">
      <div class="empty" >
        <div class="fill" draggable="true"></div>
      </div>
      <div class="empty"></div>
      <div class="empty"></div>
      <div class="empty"></div>
      <div class="empty"></div>
    </div>
  </div>
  <script src="./21.js"></script>
</body>
</html>